春秋战国之际,楚国开始衰落。但是楚国对江汉平原的开发在这一时期却取得了显著的成效。农业上,采用先进的生产工具和耕作技术,粮食生产效率高;手工业上,漆器制造业和丝织业发达;商业上,国内市场繁荣,对外贸易也比较发达。这种卓有成效的开发为后来宣威盛世的到来打下了坚实的经济基础。 Spring and Autumn Period, Chu began to decline. However, the development of the Jianghan Plain by the Chu Kingdom achieved remarkable results during this period. In agriculture, using advanced production tools and farming techniques, grain production is highly efficient; handicraft industry, lacquer manufacturing and silk industry developed; commercial, domestic market prosperity, foreign trade is also relatively developed. This fruitful development has laid a solid economic foundation for the subsequent prosperity of Xuanwei.